Exhaust Manifold Replacement (LUK, LEA)

Fig 1: Exhaust Manifold

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
WARNING: Refer to Hot Exhaust System Warning . Preliminary Procedures Remove the catalytic converter. Refer to Catalytic Converter Replacement (LUK, LEA) . Remove the secondary air injection pipe (LEA), if equipped. Refer to Secondary Air Injection Pipe Replacement (LEA) . Remove both secondary air injection valves (LUK), if equipped. Refer to Secondary Air Injection Check Valve Replacement (LEA) . Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LUK) . Remove the exhaust manifold heated oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Sensor 1 .
1	Exhaust Manifold Nut (Qty:10) CAUTION: Refer to Fastener Caution . Tighten First Pass: 14 N.m (10 lb ft) Final Pass: 14 N.m (10 lb ft)
2	Exhaust Manifold Gasket NOTE: Replace with a NEW exhaust manifold gasket. Procedure Remove the secondary air injection check valve pipe adapters (LUK), if equipped. Refer to Secondary Air Injection Check Valve Pipe Adapter Replacement - Left Side (LUK) .
3	Exhaust Manifold Procedure Remove and discard the exhaust manifold gasket. Clean any exhaust manifold gasket debris from the cylinder head and exhaust manifold. Install new exhaust manifold gasket. Tighten the exhaust manifold nuts working from the center out.